Snow plow



Oct. 13, 1970 w. A. SNYDER 3,533,175

SNOW PLOW Filed Nov. 8, 1968 [.YVEYTOR. WILLIAM A- SNYDER United StatesPatent O 3,533,175 SNOW PLOW William A. Snyder, Rte. 1, Box 1493, Sandy,Oreg. 97055 Filed Nov. 8, 1968, Ser. No. 774,249 Int. Cl. E01h /04 US.Cl. 37-44 5 Claims ABSTRACT OF THE DISCLOSURE A snow plow, which I calla snow blazer provided with two vertical mold-boards and a mechanism formoving these boards between a first closed position at which in thehorizontal plane a V shaped structure is formed and a second openposition at which the boards as viewed in the horizontal plane areparallel. The plow in its first position is driven vertex forward into asnow drift or the like. The plow is then placed into its second positionto push the snow outward and away from the plow.

SUMMARY OF THE INVENTION My plow employs a frame which in the horizontalplane defines an isosceles triangle. Each of the mold-boards is disposedadjacent one of the legs of the frame. Each of the mold-boards ishingedly secured to a corresponding end of the base member of the frame.Two hydraulic cylinders have plungers, one plunger being connected toone board, the other plunger to the other. The cylinders are operatedtogether. When the plungers are withdrawn, the boards are pulled incontact with the legs to define the closed position. When the plungersare extended, the boards are extended parallel in the second position.

BRIEF DESCRIPTION OF THE DRAWINGS In the drawings:

FIG. 1 is a top plan view of my plow as shown with closed mold-boards;

FIG. 2 is a view similar to FIG. 1 but showing the mold-boards in openposition;

FIG. 3 is a detail perspective view of the nose portion of my plow inclosed position;

FIG. 4 is a cross section taken along line 4-4 in FIG. 1;

FIG. 5 is a view similar to FIG. 3 but showing the nose portion in openposition;

FIG. 6 is a view of the left side of the edge plate of my plow as viewedfrom the inside; and

FIG. 7 is a cross section taken along 77 in FIG. 1.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS Referring now to FIGS. 1-7a vertically disposed left mold-board 10 has a curved nosepiece 12cooperating with a straight mating nose piece 14 of a verticallydisposed right mold-board 16. Both mold-boards have outwardly curved topedges 18 to guide snow away from the plow.

A vertical horizontally extending heavy edge plate 20 extends from themidpoint of a transverse horizontal member 22 forward. Horizontalmembers 24 and 26 which are of like length define a horizontal isoscelestriangular frame with member 22 and extend between opposite ends ofmembers 22 to opposite sides of plate 20. A mounting channel 28 extendsto the vertex of members 24 and 26 Patented Oct. 13, 1970 beingconnected thereto by pin 30 and having a transverse element 32 passingthrough opening 34 in plate 20. Channel 28 is also disposed in cage 36which permits the up and down movement of the channel when the plow isin use.

Mold-board hinges 38 secure opposite ends of member 22 to thecorresponding mold-boards 10 and 16. Member 22 also supports left links40.

An adjustable stabilizer bar link 42 is disposed on top of thestructure.

A pivot anchor 44 is held by plate 20 and supports one end of hydrauliccylinders 46 and 48. Cylinder 46 has a plunger 50 connected tomold-board 10. Cylinder 48 has a plunger 52 connected to mold-board 16.

When the cylinders are actuated to force out the plungers, themold-boards are extended outward and parallel to force the snow outward;when the cylinders are actuated to withdraw the plungers, themold-boards are brought together to form a V.

The nosepiece 12 is curved to prevent snow from wedging the mold-boardsapart when the plow is in motion. In use, if the snow-drift is too largeor deep to break through and the vehicle operating the plow stalls, thecylinders are actuated to open the mold-boards and force the snowoutward and away from the plow. The vehicle is then backed out, themold-boards are closed, and another approach is made. This repeatedaction enables the plow to penetrate and enable breakthrough. Thevehicle can be backed out with the mold-boards open, since they will notcatch on the snow.

While I have described my invention with particular reference to thedrawings, such as not to be considered as limiting its actual scope.

Having thus described this invention, what is asserted as new is:

1. A snow plow comprising:

a frame which in the horizontal plane defines an isosceles trianglehaving two legs and a base;

first and second mold-boards lying in vertical planes and having matablenose pieces, each mold-board being disposed adjacent the outside of acorresponding s;

first means hingedly securing each mold-board to a corresponding one ofthe ends of the base; and second means connected to said mold-boards,said second means having a first position at which the moldboards arepulled along side of the corresponding legs and said nose pieces meetwhereby said moldboards, in the horizontal plane, define a V, saidsecond means having a second position at which, in the horizontal plane,said mold-boards, are pushed outward and are parallel to each other.

2. A snow plow as set forth in claim 1 wherein said second meansincludes first and second hydraulic cylinders, each cylinder having aplunger secured to a corresponding mold-board, said plungers beingwithdrawn or extended together, said plungers being extended to definethe second position and being withdrawn to define the first position.

3. A snow plow as set forth in claim 2 further including a verticalplate extending across and through said frame from the midpoint of thebase through the angle formed between the legs.

4. A snOW plow as set forth in claim 3 wherein a portion of said plateextends between the nose pieces when the second means is in the firstposition.

3 5. A snow plow as set forth in claim 4 wherein one 3,431,661 3/1969Carlson.

d d h t ht. nose plece 1s curve an t e other 1s s ra1g ROBERT E. PULFREYPrimary Examiner References Cited E. H. EICKHOLT, Assistant ExaminerUNITED STATES PATENTS 5 US Cl XR 1,889,667 11/1932 Klauer. 3736;172-805

